Hey Steve - As Gary said, it's peace of mind and if you have or want an "amp'd" sound system it is pretty much required - Install a second battery along with a battery selection switch - You won't be dissapointed
As for launching/loading - Go to the post/discussion on the 270CR - Really not a lot of difference as to how to handle your boat other than yours is lighter and more manuverable - Yes, you can probably power your boat onto your trailer but be sure you know the depth conditions of your ramp - It is best to go slow when beginning and as you learn how your boat handles and ramp conditions you can take it up a level - Remember to trim up your engine when approaching any landing - Always have your fenders out - When you can, use the wind to help you at the docks - Looks like you have a bunker trailer so if the bunks are not submerged, get them wet before loading - Use your engine/power to control your boat - I see way too many boaters approaching at trolling speed (sometimes faster) and then shut down the engine before they are docked - Usually the results are not what the driver was hoping for! Enjoy your new boat!
Rory Malner
'95 250CR - 7.4L W/BIII
"Parents Gone Wild"